dynamic vibration testing services | HALT, HASS & Drop Testing Services
Dynamics and Vibration Testing Services
Understanding Dynamic Testing
Dynamic Testing requires products to pass a series of evaluations to confirm readiness for mass production. Each industry applies a range of test specifications to validate performance, with the objective of determining whether the tested components will ultimately form a complete, market-ready product.
Automobile, aircraft or machine are strong enough to withstand the dynamics. Envitest includes various types of dynamic testing employed on various industries.
Dynamics testing types range from moderate to intense based on the endurance requirements of a given product. Envitest has some of the most extensive dynamics testing capabilities in the world. We operate Dynamics Testing facilities end to end and we have extensive experience with all product types.The goal of dynamic testing is to determine how many forces a product can withstand and still maintain its composition and functionality.
In real-life settings, excess loads of acceleration can have damaging effects on numerous commercial and industrial products. For example,
- Structural damage
- Stressed, leaky seals
- Jammed actuators
- Broken mounting pieces
- Flickering sensors
- Ruined contacts
Vibration Testing
Vibration testing is a crucial part of product validation in aerospace, automotive, and electronics sectors. These tests help identify weak points in design before full production. Using advanced shaker tables, Envitest replicates real-world tremors to assess performance and durability under vibration stress.
Standards covered include MIL STD 810, MIL-STD 202 method 213, MIL-STD-810 method 516.6, MIL-STD-750-2 method 2016.2, ISTA 3A, JSS 55555, IEC 60068-2-XX, NEBS-GR, RTCA-DO, JIS, ISO, ETSI-EN, IS.
Standards Followed for Dynamic Vibration Testing
| Vibration Testing |
|---|
MIL-STD-810, MIL-HDBK-2164A |
JSS 55555, JSS 50101 |
RTCA DO 160 |
IS 9000, ISO 16750-3 |
Mechanical Shock Testing
Mechanical shock testing evaluates product fragility under sudden acceleration or deceleration. As a subset of vibration testing, it helps determine durability across automotive, aerospace, and defense applications following MIL and IEC standards.
Mechanical shock testing is widely used in the automotive, aerospace, and defense industries. Common requirements for shock testing include MIL-STD-810, MIL-STD-202 Method 213, MIL-STD-810 Method 516.6, MIL-STD-750-2 Method 2016.2, as well as other industrial testing standards.
Drop Testing
Drop testing determines a product’s ability to withstand impact from falls or mishandling during transport. Products or packaging are tested to identify the maximum drop height at which they remain structurally intact. This process is vital for sectors like consumer electronics, automotive components, and industrial products.
Common drop test conditions involve free fall from specific heights onto solid surfaces. The drop height is based on the requirements of standards such as MIL-STD, JSS, IEC, ISO, ASTM, and ISTA.
HALT testing, HASS testing, HATS testing
For manufacturers, it is important to know how each product is likely to endure the process of aging during its expected lifespan. The tests that employ age-accelerating processes include Highly Accelerated Life Testing (HALT), Highly Accelerated Stress Screening (HASS) and Highly Accelerated Thermal Shock (HATS) testing. HALT tests are employed to find weaknesses within a given test device. During a HALT test, heat and vibration are applied for short periods at high volumes to see how the product will weather the exposure.
Ultimately, the objective is not to see whether a product can survive the test but to determine how long and at what levels of exposure the product can function and hold its composition before failing.
The purpose of HASS testing is to see whether defects are present in a product during stages of manufacturing. While HALT testing is employed to test products in beta form, HASS tests challenge the durability of each product in revised form. Highly Accelerated Thermal Shock (HATS) testing, as the name implies, tests the durability and operability of products in the event of thermal shock.
Capabilities Include:
Acoustic noise testing
Impact testing
Vibration testing
Shock testing
Drop test
HALT testing
HASS testing
HATS testing
Materials fatigue testing
Bump/Bounce Testing
Quality Approved Lab
Case Studies
1. Challenges in Testing Radio Oscillators: A Comprehensive Examination
Introduction
Radio oscillators play a vital role in communication systems, generating continuous radio frequency (RF) signals for wireless data, audio, and video transmission. At the core of this process is the feedback principle — where a portion of the output signal is reintroduced to the input, sustaining oscillation and producing the desired frequency.
Testing radio oscillators for vibration testing and other dynamic stress conditions presents challenges due to limited information about internal components and their fragility. This case study explores these issues, the impact of inadequate testing, and practical solutions for improvement.
Challenge
One of the main challenges when testing radio oscillators is insufficient information about internal components. When samples undergo rigorous tests, these unknowns often cause unsatisfactory outcomes and repeated failures.
Customers seeking compliance with strict acceptance documents frequently submit samples for evaluation. However, inconsistent test setups or equipment sensitivity may lead to false failures — causing confusion between customers and labs.
In some cases, identical samples tested across multiple labs yield similar failing results. This indicates deeper design or component-level issues rather than laboratory error. Even when a pass report is obtained, further testing by the end customer may invalidate the results.
This situation is compounded when the same customer decides to approach multiple test labs, only to find that the results are consistent across the board – a failing grade. Frustration mounts as the customer seeks a pass report without delving into the intricate details of the oscillator’s functionality. Even if the customer manages to obtain a pass report, it may be rendered useless, as the end customer conducts additional assembly and testing.
Solutions
Addressing these issues requires a structured testing approach and proactive communication. A simple method, such as temporarily removing the crystal oscillator during vibration testing, can enhance accuracy. Envitest follows these key steps to ensure reliability:
- Component Identification: Clearly identifying critical components in test samples helps test labs understand design complexity and testing sensitivity.
- Collaboration: Maintaining close communication between test engineers and customers ensures both parties understand the sample structure and expected outcomes.
- Component Isolation: For fragile assemblies, Envitest isolates or temporarily removes sensitive components to prevent interference and secure accurate test results.
- Education: Educating customers about the significance of these components and their influence on dynamic testing outcomes helps manage expectations and reduce failures.
Conclusion: Testing radio oscillators requires a comprehensive, detail-oriented approach. Hidden internal components often cause inaccurate results, leading to frustration for both customers and test labs. By adopting structured processes — component identification, collaboration, and isolation — Envitest ensures more accurate, repeatable outcomes. Continuous innovation and clear communication remain key to success in RF reliability and vibration testing environments.
2. Analyzing Vibration Tests on Electric Scooters: Frequent Rear Fender Failures
Introduction
The electric scooter industry has witnessed remarkable growth in recent years as urban commuters seek sustainable and efficient modes of transportation. Electric scooters (EV scooters) have become increasingly popular due to their eco-friendliness and convenience. However, like any other technology, they are not immune to challenges. One such recurring issue the customer of this product faced was failure of rear fenders due to vibrations. In this article, we analyse into the scope of vibration tests on electric scooters and understand why the rear fender was a weak point and what one can do to address this issue.
Challenge
Electric scooters are designed to be nimble and lightweight, making them perfect. These very characteristics that make them agile also make them susceptible to vibrations, especially on uneven roads or during high-speed rides. Vibrations radiate from various sources, including scooter’s own motor, road irregularities, and tires. These vibrations can have a significant impact on the structural integrity of the scooter’s components. Let’s only discuss what we faced as failure – the rear fender.
So we subjected this product for vibration testing for a long duration of 100 hours. This was a proto sample and objective was Data Analysis. We were tasked to collect data to assess how vibrations affect various parts of the scooter such that we can pinpoint the area’s most vulnerable to vibration-induced stress.
Vibration Testing
During the process, we saw one component which was not behaving as intended. Every component was giving their best to withhold their component characteristics except one – ‘Rear Fender’. In this scooter, the rear fender’s main function is to protect tires and braking systems from mud or other splashes so that they are safer and more efficient, and help prevent mud, dirt, dust particles and other liquids from being thrown inside the scooter engine and passenger area when the tires are rolling. Importantly, they also hold the licence plate. When we simulate real-world scenarios by subjecting scooters to a range of vibration frequencies, amplitudes, and durations to replicate the conditions of urban roads and riders’ experiences, we expect that the fitted components behave and sustain the energy to make product reliable.
We observed failure and next was to dissect the reasons. We worked on three important aspects:
- Material Selection
- Placement and holding pattern.
- Loads acting on them.
Well, we started to check with the loads acting during the vibration test such that the material that was used has significant strength to hod such loads. Soon it was realised that the material used has density to hold such loads and does not have effects due to acting forces. Next moved to holding pattern. Here we found a significant flaw. The shear force distribution of the component. Basically, it was a design constraint. To accommodate the rear fender in the available space, the designer had to shape the fenders where it compromises its shear force distribution due to the imbalance. This design was accommodating the component to main panel chassis, but while doing so, it was losing significant amount for strength required, igniting the very resonance points at all the time.
Resonance is a physical phenomenon that occurs when force is applied which matches to natural vibration frequency, this causes component to vibrate with a higher amplitude, leading to significant consequences. So component was sent to re-engineering.
Conclusion: The rear fender failure due to vibrations was a recurring issue in the electric scooter. As electric scooters continue to run, it’s essential to invest in extensive vibration testing and develop innovative solutions to enhance their durability. By addressing these issues, the industry can provide a safer and more reliable means of sustainable transportation.
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Envitest consistently delivers precise vibration test results that help us meet our product validation goals. Their expertise, reliability, and quick turnaround make them a trusted testing partner
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Reliable testing partner for startups aiming to meet IEC 60068 and MIL-STD standards. Their support helped us validate product durability under real-world stress.
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Envitest has been an invaluable partner in our product development process. Their dynamic and vibration testing services have helped us to identify and address potential problems early on, which has saved us time and money in the long run. Their engineers are highly knowledgeable and experienced, and they are always willing to go the extra mile to help us meet our testing goals.
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Envitest’s drop testing services have consistently delivered accurate bounce impact results with top-tier equipment and expert support. Their custom test plans and professionalism set them apart. Highly recommended!
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